27655945 has 8 divisors (see below), whose sum is σ = 33242760. Its totient is φ = 22087680.

The previous prime is 27655919. The next prime is 27655951. The reversal of 27655945 is 54955672.

It can be written as a sum of positive squares in 4 ways, for example, as 11431161 + 16224784 = 3381^2 + 4028^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-27655945 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110 + ... + 7519.

It is an arithmetic number, because the mean of its divisors is an integer number (4155345).

Almost surely, 2^27655945 is an apocalyptic number.

It is an amenable number.

27655945 is a deficient number, since it is larger than the sum of its proper divisors (5586815).

27655945 is an equidigital number, since it uses as much as digits as its factorization.

27655945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9275.

The product of its digits is 378000, while the sum is 43.

The square root of 27655945 is about 5258.8919935667. The cubic root of 27655945 is about 302.4100135316.

The spelling of 27655945 in words is "twenty-seven million, six hundred fifty-five thousand, nine hundred forty-five".